/**
 * 云层动画帧 
 */
var getStairFrames = (function () {

  var frames = {
    stair_friable: [{
        x: 0,
        y: 0,
        duration: 50,
        collRect: [[0, 0, 142, 58]]
      }, {
        x: 256,
        y: 0,
        duration: 50
      }, {
        x: 512,
        y: 0,
        duration: 50
      }, {
        x: 768,
        y: 0,
        duration: 50
      }, {
        x: 1024,
        y: 0,
        duration: 50
      }, {
        x: 1280,
        y: 0,
        duration: 50
      }],
    stair_moveable: [{
        x: 0,
        y: 0,
        duration: 50,
        collRect: [[0, 0, 156, 72]]
      }, {
        x: 256,
        y: 0,
        duration: 50,
        collRect: [[0, 0, 156, 72]]
      }, {
        x: 0,
        y: 0,
        duration: 50,
        collRect: [[0, 0, 156, 72]]
      }],
    stair_stable_01: [{
        x: 0,
        y: 0,
        collRect: [[0, 0, 154, 54]]
      }],
    stair_stable_02: [{
        x: 0,
        y: 0,
        collRect: [[0, 0, 153, 54]]
      }],
    stair_stable_03: [{
        x: 0,
        y: 0,
        collRect: [[0, 0, 153, 54]]
      }],
    stair_stable_04: [{
        x: 0,
        y: 0,
        collRect: [[0, 0, 153, 54]]
      }],
    stair_stable_05: [{
        x: 0,
        y: 0,
        collRect: [[0, 0, 154, 54]]
      }]
  };

  /**
   * @param {String} animName
   */
  return function (animName) {
    return frames[animName];
  };
})();
